Hey Pluto ...
Welcome to KA... Sorry you're havin a rough time with it... sounds like where i was about two years ago when i got my first xrays.. Have you had bloodwork done for Hla b27 gene, ESR and CRP.. They are essential to show if there is anything fishy going on... judging by your scan report there is.. so i don't know why they'd be so rude as to say it's in your head... that stinks!.. Anyways GP should order those bloodtests and from there you should get to a specialist pronto so you can sort this out. I didn't get dx ed for quite a few years and went through alot of unecesary pain and damage because no one picked up on it... now i'm on meds and physio and healthier life/work style and doing alot better. Hope you get some clues soon.
Rob